Please apply,
Adam
diff -urN a/drivers/pnp/support.c b/drivers/pnp/support.c
--- a/drivers/pnp/support.c Thu Jan 1 00:00:00 1970
+++ b/drivers/pnp/support.c Mon Feb 3 15:49:22 2003
@@ -0,0 +1,666 @@
+/*
+ * support.c - provides standard pnp functions for the use of pnp protocol drivers,
+ *
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ *
+ * Resource parsing functions are based on those in the linux pnpbios driver.
+ * Copyright Christian Schmidt, Tom Lees, David Hinds, Alan Cox, Thomas Hood,
+ * Brian Gerst and Adam Belay.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+
+#ifdef CONFIG_PNP_DEBUG
+ #define DEBUG
+#else
+ #undef DEBUG
+#endif
+
+#include <linux/pnp.h>
+#include "base.h"
+
+#define SMALL_TAG_PNPVERNO 0x01
+#define SMALL_TAG_LOGDEVID 0x02
+#define SMALL_TAG_COMPATDEVID 0x03
+#define SMALL_TAG_IRQ 0x04
+#define SMALL_TAG_DMA 0x05
+#define SMALL_TAG_STARTDEP 0x06
+#define SMALL_TAG_ENDDEP 0x07
+#define SMALL_TAG_PORT 0x08
+#define SMALL_TAG_FIXEDPORT 0x09
+#define SMALL_TAG_VENDOR 0x0e
+#define SMALL_TAG_END 0x0f
+#define LARGE_TAG 0x80
+#define LARGE_TAG_MEM 0x01
+#define LARGE_TAG_ANSISTR 0x02
+#define LARGE_TAG_UNICODESTR 0x03
+#define LARGE_TAG_VENDOR 0x04
+#define LARGE_TAG_MEM32 0x05
+#define LARGE_TAG_FIXEDMEM32 0x06
+
+
+/**
+ * pnp_is_active - Determines if a device is active based on its current resources
+ * @dev: pointer to the desired PnP device
+ *
+ */
+
+int pnp_is_active(struct pnp_dev * dev)
+{
+ if (!pnp_port_start(dev, 0) && pnp_port_len(dev, 0) <= 1 &&
+ !pnp_mem_start(dev, 0) && pnp_mem_len(dev, 0) <= 1 &&
+ pnp_irq(dev, 0) == -1 &&
+ pnp_dma(dev, 0) == -1)
+ return 0;
+ else
+ return 1;
+}
+
+
+/*
+ * Current resource reading functions *
+ */
+
+static void current_irqresource(struct pnp_resource_table * res, int irq)
+{
+ int i = 0;
+ while ((res->irq_resource[i].flags & IORESOURCE_IRQ) && i < PNP_MAX_IRQ) i++;
+ if (i < PNP_MAX_IRQ) {
+ res->irq_resource[i].start =
+ res->irq_resource[i].end = (unsigned long) irq;
+ res->irq_resource[i].flags = IORESOURCE_IRQ; // Also clears _UNSET flag
+ }
+}
+
+static void current_dmaresource(struct pnp_resource_table * res, int dma)
+{
+ int i = 0;
+ while ((res->dma_resource[i].flags & IORESOURCE_DMA) && i < PNP_MAX_DMA) i++;
+ if (i < PNP_MAX_DMA) {
+ res->dma_resource[i].start =
+ res->dma_resource[i].end = (unsigned long) dma;
+ res->dma_resource[i].flags = IORESOURCE_DMA; // Also clears _UNSET flag
+ }
+}
+
+static void current_ioresource(struct pnp_resource_table * res, int io, int len)
+{
+ int i = 0;
+ while ((res->port_resource[i].flags & IORESOURCE_IO) && i < PNP_MAX_PORT) i++;
+ if (i < PNP_MAX_PORT) {
+ res->port_resource[i].start = (unsigned long) io;
+ res->port_resource[i].end = (unsigned long)(io + len - 1);
+ res->port_resource[i].flags = IORESOURCE_IO; // Also clears _UNSET flag
+ }
+}
+
+static void current_memresource(struct pnp_resource_table * res, int mem, int len)
+{
+ int i = 0;
+ while ((res->mem_resource[i].flags & IORESOURCE_MEM) && i < PNP_MAX_MEM) i++;
+ if (i < PNP_MAX_MEM) {
+ res->mem_resource[i].start = (unsigned long) mem;
+ res->mem_resource[i].end = (unsigned long)(mem + len - 1);
+ res->mem_resource[i].flags = IORESOURCE_MEM; // Also clears _UNSET flag
+ }
+}
+
+/**
+ * pnp_parse_current_resources - Extracts current resource information from a raw PnP resource structure
+ * @p: pointer to the start of the structure
+ * @end: pointer to the end of the structure
+ * @res: pointer to the resource table to record to
+ *
+ */
+
+unsigned char * pnp_parse_current_resources(unsigned char * p, unsigned char * end, struct pnp_resource_table * res)
+{
+ int len;
+
+ if (!p)
+ return NULL;
+
+ /* Blank the resource table values */
+ pnp_init_resource_table(res);
+
+ while ((char *)p < (char *)end) {
+
+ if(p[0] & LARGE_TAG) { /* large tag */
+ len = (p[2] << 8) | p[1];
+ switch (p[0] & 0x7f) {
+ case LARGE_TAG_MEM:
+ {
+ int io = *(short *) &p[4];
+ int size = *(short *) &p[10];
+ if (len != 9)
+ goto lrg_err;
+ current_memresource(res, io, size);
+ break;
+ }
+ case LARGE_TAG_ANSISTR:
+ {
+ /* ignore this for now */
+ break;
+ }
+ case LARGE_TAG_MEM32:
+ {
+ int io = *(int *) &p[4];
+ int size = *(int *) &p[16];
+ if (len != 17)
+ goto lrg_err;
+ current_memresource(res, io, size);
+ break;
+ }
+ case LARGE_TAG_FIXEDMEM32:
+ {
+ int io = *(int *) &p[4];
+ int size = *(int *) &p[8];
+ if (len != 9)
+ goto lrg_err;
+ current_memresource(res, io, size);
+ break;
+ }
+ default: /* an unkown tag */
+ {
+ lrg_err:
+ pnp_warn("parser: Unknown large tag '0x%x'.", p[0] & 0x7f);
+ break;
+ }
+ } /* switch */
+ p += len + 3;
+ continue;
+ } /* end large tag */
+
+ /* small tag */
+ len = p[0] & 0x07;
+ switch ((p[0]>>3) & 0x0f) {
+ case SMALL_TAG_IRQ:
+ {
+ int i, mask, irq = -1;
+ if (len < 2 || len > 3)
+ goto sm_err;
+ mask= p[1] + p[2]*256;
+ for (i=0;i<16;i++, mask=mask>>1)
+ if(mask & 0x01) irq=i;
+ current_irqresource(res, irq);
+ break;
+ }
+ case SMALL_TAG_DMA:
+ {
+ int i, mask, dma = -1;
+ if (len != 2)
+ goto sm_err;
+ mask = p[1];
+ for (i=0;i<8;i++, mask = mask>>1)
+ if(mask & 0x01) dma=i;
+ current_dmaresource(res, dma);
+ break;
+ }
+ case SMALL_TAG_PORT:
+ {
+ int io= p[2] + p[3] *256;
+ int size = p[7];
+ if (len != 7)
+ goto sm_err;
+ current_ioresource(res, io, size);
+ break;
+ }
+ case SMALL_TAG_FIXEDPORT:
+ {
+ int io = p[1] + p[2] * 256;
+ int size = p[3];
+ if (len != 3)
+ goto sm_err;
+ current_ioresource(res, io, size);
+ break;
+ }
+ case SMALL_TAG_END:
+ {
+ p = p + 2;
+ return (unsigned char *)p;
+ break;
+ }
+ default: /* an unkown tag */
+ {
+ sm_err:
+ pnp_warn("parser: Unknown small tag '0x%x'.", p[0]>>3);
+ break;
+ }
+ }
+ p += len + 1;
+ }
+ pnp_err("parser: Resource structure does not contain an end tag.");
+
+ return NULL;
+}
+
+
+/*
+ * Possible resource reading functions *
+ */
+
+static void possible_mem(unsigned char *p, int size, int depnum, struct pnp_dev *dev)
+{
+ struct pnp_mem * mem;
+ mem = pnp_alloc(sizeof(struct pnp_mem));
+ if (!mem)
+ return;
+ mem->min = ((p[3] << 8) | p[2]) << 8;
+ mem->max = ((p[5] << 8) | p[4]) << 8;
+ mem->align = (p[7] << 8) | p[6];
+ mem->size = ((p[9] << 8) | p[8]) << 8;
+ mem->flags = p[1];
+ pnp_add_mem_resource(dev,depnum,mem);
+ return;
+}
+
+static void possible_mem32(unsigned char *p, int size, int depnum, struct pnp_dev *dev)
+{
+ struct pnp_mem * mem;
+ mem = pnp_alloc(sizeof(struct pnp_mem));
+ if (!mem)
+ return;
+ mem->min = (p[5] << 24) | (p[4] << 16) | (p[3] << 8) | p[2];
+ mem->max = (p[9] << 24) | (p[8] << 16) | (p[7] << 8) | p[6];
+ mem->align = (p[13] << 24) | (p[12] << 16) | (p[11] << 8) | p[10];
+ mem->size = (p[17] << 24) | (p[16] << 16) | (p[15] << 8) | p[14];
+ mem->flags = p[1];
+ pnp_add_mem_resource(dev,depnum,mem);
+ return;
+}
+
+static void possible_fixed_mem32(unsigned char *p, int size, int depnum, struct pnp_dev *dev)
+{
+ struct pnp_mem * mem;
+ mem = pnp_alloc(sizeof(struct pnp_mem));
+ if (!mem)
+ return;
+ mem->min = mem->max = (p[5] << 24) | (p[4] << 16) | (p[3] << 8) | p[2];
+ mem->size = (p[9] << 24) | (p[8] << 16) | (p[7] << 8) | p[6];
+ mem->align = 0;
+ mem->flags = p[1];
+ pnp_add_mem_resource(dev,depnum,mem);
+ return;
+}
+
+static void possible_irq(unsigned char *p, int size, int depnum, struct pnp_dev *dev)
+{
+ struct pnp_irq * irq;
+ irq = pnp_alloc(sizeof(struct pnp_irq));
+ if (!irq)
+ return;
+ irq->map = (p[2] << 8) | p[1];
+ if (size > 2)
+ irq->flags = p[3];
+ pnp_add_irq_resource(dev,depnum,irq);
+ return;
+}
+
+static void possible_dma(unsigned char *p, int size, int depnum, struct pnp_dev *dev)
+{
+ struct pnp_dma * dma;
+ dma = pnp_alloc(sizeof(struct pnp_dma));
+ if (!dma)
+ return;
+ dma->map = p[1];
+ dma->flags = p[2];
+ pnp_add_dma_resource(dev,depnum,dma);
+ return;
+}
+
+static void possible_port(unsigned char *p, int size, int depnum, struct pnp_dev *dev)
+{
+ struct pnp_port * port;
+ port = pnp_alloc(sizeof(struct pnp_port));
+ if (!port)
+ return;
+ port->min = (p[3] << 8) | p[2];
+ port->max = (p[5] << 8) | p[4];
+ port->align = p[6];
+ port->size = p[7];
+ port->flags = p[1] ? PNP_PORT_FLAG_16BITADDR : 0;
+ pnp_add_port_resource(dev,depnum,port);
+ return;
+}
+
+static void possible_fixed_port(unsigned char *p, int size, int depnum, struct pnp_dev *dev)
+{
+ struct pnp_port * port;
+ port = pnp_alloc(sizeof(struct pnp_port));
+ if (!port)
+ return;
+ port->min = port->max = (p[2] << 8) | p[1];
+ port->size = p[3];
+ port->align = 0;
+ port->flags = PNP_PORT_FLAG_FIXED;
+ pnp_add_port_resource(dev,depnum,port);
+ return;
+}
+
+/**
+ * pnp_parse_possible_resources - Extracts possible resource information from a raw PnP resource structure
+ * @p: pointer to the start of the structure
+ * @end: pointer to the end of the structure
+ * @dev: pointer to the desired PnP device
+ *
+ */
+
+unsigned char * pnp_parse_possible_resources(unsigned char * p, unsigned char * end, struct pnp_dev *dev)
+{
+ int len, depnum = 0, dependent = 0;
+
+ if (!p)
+ return NULL;
+
+ if (pnp_build_resource(dev, 0) == NULL)
+ return NULL;
+
+ while ((char *)p < (char *)end) {
+
+ if(p[0] & LARGE_TAG) { /* large tag */
+ len = (p[2] << 8) | p[1];
+ switch (p[0] & 0x7f) {
+ case LARGE_TAG_MEM:
+ {
+ if (len != 9)
+ goto lrg_err;
+ possible_mem(p,len,depnum,dev);
+ break;
+ }
+ case LARGE_TAG_MEM32:
+ {
+ if (len != 17)
+ goto lrg_err;
+ possible_mem32(p,len,depnum,dev);
+ break;
+ }
+ case LARGE_TAG_FIXEDMEM32:
+ {
+ if (len != 9)
+ goto lrg_err;
+ possible_fixed_mem32(p,len,depnum,dev);
+ break;
+ }
+ default: /* an unkown tag */
+ {
+ lrg_err:
+ pnp_warn("parser: Unknown large tag '0x%x'.", p[0] & 0x7f);
+ break;
+ }
+ } /* switch */
+ p += len + 3;
+ continue;
+ } /* end large tag */
+
+ /* small tag */
+ len = p[0] & 0x07;
+ switch ((p[0]>>3) & 0x0f) {
+ case SMALL_TAG_IRQ:
+ {
+ if (len < 2 || len > 3)
+ goto sm_err;
+ possible_irq(p,len,depnum,dev);
+ break;
+ }
+ case SMALL_TAG_DMA:
+ {
+ if (len != 2)
+ goto sm_err;
+ possible_dma(p,len,depnum,dev);
+ break;
+ }
+ case SMALL_TAG_STARTDEP:
+ {
+ if (len > 1)
+ goto sm_err;
+ dependent = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE;
+ if (len > 0)
+ dependent = 0x100 | p[1];
+ pnp_build_resource(dev,dependent);
+ depnum = pnp_get_max_depnum(dev);
+ break;
+ }
+ case SMALL_TAG_ENDDEP:
+ {
+ if (len != 0)
+ goto sm_err;
+ depnum = 0;
+ break;
+ }
+ case SMALL_TAG_PORT:
+ {
+ if (len != 7)
+ goto sm_err;
+ possible_port(p,len,depnum,dev);
+ break;
+ }
+ case SMALL_TAG_FIXEDPORT:
+ {
+ if (len != 3)
+ goto sm_err;
+ possible_fixed_port(p,len,depnum,dev);
+ break;
+ }
+ case SMALL_TAG_END:
+ {
+ p = p + 2;
+ return (unsigned char *)p;
+ break;
+ }
+ default: /* an unkown tag */
+ {
+ sm_err:
+ pnp_warn("parser: Unknown small tag '0x%x'.", p[0]>>3);
+ break;
+ }
+ }
+ p += len + 1;
+ }
+ pnp_err("parser: Resource structure does not contain an end tag.");
+
+ return NULL;
+}
+
+
+/*
+ * Resource Writing functions
+ */
+
+static void write_mem(unsigned char *p, struct resource * res)
+{
+ unsigned long base = res->start;
+ unsigned long len = res->end - res->start + 1;
+ p[2] = (base >> 8) & 0xff;
+ p[3] = ((base >> 8) >> 8) & 0xff;
+ p[4] = (base >> 8) & 0xff;
+ p[5] = ((base >> 8) >> 8) & 0xff;
+ p[8] = (len >> 8) & 0xff;
+ p[9] = ((len >> 8) >> 8) & 0xff;
+ return;
+}
+
+static void write_mem32(unsigned char *p, struct resource * res)
+{
+ unsigned long base = res->start;
+ unsigned long len = res->end - res->start + 1;
+ p[2] = base & 0xff;
+ p[3] = (base >> 8) & 0xff;
+ p[4] = (base >> 16) & 0xff;
+ p[5] = (base >> 24) & 0xff;
+ p[6] = base & 0xff;
+ p[7] = (base >> 8) & 0xff;
+ p[8] = (base >> 16) & 0xff;
+ p[9] = (base >> 24) & 0xff;
+ p[14] = len & 0xff;
+ p[15] = (len >> 8) & 0xff;
+ p[16] = (len >> 16) & 0xff;
+ p[17] = (len >> 24) & 0xff;
+ return;
+}
+
+static void write_fixed_mem32(unsigned char *p, struct resource * res)
+{ unsigned long base = res->start;
+ unsigned long len = res->end - res->start + 1;
+ p[2] = base & 0xff;
+ p[3] = (base >> 8) & 0xff;
+ p[4] = (base >> 16) & 0xff;
+ p[5] = (base >> 24) & 0xff;
+ p[6] = len & 0xff;
+ p[7] = (len >> 8) & 0xff;
+ p[8] = (len >> 16) & 0xff;
+ p[9] = (len >> 24) & 0xff;
+ return;
+}
+
+static void write_irq(unsigned char *p, struct resource * res)
+{
+ unsigned long map = 0;
+ map = 1 << res->start;
+ p[1] = map & 0xff;
+ p[2] = (map >> 8) & 0xff;
+ return;
+}
+
+static void write_dma(unsigned char *p, struct resource * res)
+{
+ unsigned long map = 0;
+ map = 1 << res->start;
+ p[1] = map & 0xff;
+ return;
+}
+
+static void write_port(unsigned char *p, struct resource * res)
+{
+ unsigned long base = res->start;
+ unsigned long len = res->end - res->start + 1;
+ p[2] = base & 0xff;
+ p[3] = (base >> 8) & 0xff;
+ p[4] = base & 0xff;
+ p[5] = (base >> 8) & 0xff;
+ p[7] = len & 0xff;
+ return;
+}
+
+static void write_fixed_port(unsigned char *p, struct resource * res)
+{
+ unsigned long base = res->start;
+ unsigned long len = res->end - res->start + 1;
+ p[1] = base & 0xff;
+ p[2] = (base >> 8) & 0xff;
+ p[3] = len & 0xff;
+ return;
+}
+
+/**
+ * pnp_write_resources - Writes resource information to a raw PnP resource structure
+ * @p: pointer to the start of the structure
+ * @end: pointer to the end of the structure
+ * @res: pointer to a resource table containing the resources to set
+ *
+ */
+
+unsigned char * pnp_write_resources(unsigned char * p, unsigned char * end, struct pnp_resource_table * res)
+{
+ int len, port = 0, irq = 0, dma = 0, mem = 0;
+
+ if (!p)
+ return NULL;
+
+ while ((char *)p < (char *)end) {
+
+ if(p[0] & LARGE_TAG) { /* large tag */
+ len = (p[2] << 8) | p[1];
+ switch (p[0] & 0x7f) {
+ case LARGE_TAG_MEM:
+ {
+ if (len != 9)
+ goto lrg_err;
+ write_mem(p, &res->mem_resource[mem]);
+ mem++;
+ break;
+ }
+ case LARGE_TAG_MEM32:
+ {
+ if (len != 17)
+ goto lrg_err;
+ write_mem32(p, &res->mem_resource[mem]);
+ break;
+ }
+ case LARGE_TAG_FIXEDMEM32:
+ {
+ if (len != 9)
+ goto lrg_err;
+ write_fixed_mem32(p, &res->mem_resource[mem]);
+ break;
+ }
+ default: /* an unkown tag */
+ {
+ lrg_err:
+ pnp_warn("parser: Unknown large tag '0x%x'.", p[0] & 0x7f);
+ break;
+ }
+ } /* switch */
+ p += len + 3;
+ continue;
+ } /* end large tag */
+
+ /* small tag */
+ len = p[0] & 0x07;
+ switch ((p[0]>>3) & 0x0f) {
+ case SMALL_TAG_IRQ:
+ {
+ if (len < 2 || len > 3)
+ goto sm_err;
+ write_irq(p, &res->irq_resource[irq]);
+ irq++;
+ break;
+ }
+ case SMALL_TAG_DMA:
+ {
+ if (len != 2)
+ goto sm_err;
+ write_dma(p, &res->dma_resource[irq]);
+ dma++;
+ break;
+ }
+ case SMALL_TAG_PORT:
+ {
+ if (len != 7)
+ goto sm_err;
+ write_port(p, &res->port_resource[port]);
+ port++;
+ break;
+ }
+ case SMALL_TAG_FIXEDPORT:
+ {
+ if (len != 3)
+ goto sm_err;
+ write_fixed_port(p, &res->port_resource[port]);
+ port++;
+ break;
+ }
+ case SMALL_TAG_END:
+ {
+ p = p + 2;
+ return (unsigned char *)p;
+ break;
+ }
+ default: /* an unkown tag */
+ {
+ sm_err:
+ pnp_warn("parser: Unknown small tag '0x%x'.", p[0]>>3);
+ break;
+ }
+ }
+ p += len + 1;
+ }
+ pnp_err("parser: Resource structure does not contain an end tag.");
+
+ return NULL;
+}
+
+EXPORT_SYMBOL(pnp_is_active);
+EXPORT_SYMBOL(pnp_parse_current_resources);
+EXPORT_SYMBOL(pnp_parse_possible_resources);
+EXPORT_SYMBOL(pnp_write_resources);
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